EP 1441235 A2 20040728 - Location system
Title (en)
Location system
Title (de)
Ortungssystem
Title (fr)
Système de localisation
Publication
Application
Priority
GB 0301504 A 20030122
Abstract (en)
A location system comprises a remote device (3) which is attached to an object being located, for example a laptop computer (1). The location of the object is first determined to be within a first area (4) using cellular communication signals emitted by the remote device (3). For example, cellular triangulation techniques and/or cell location information can be used for this purpose. An operator carrying a mobile tracking device (5) then moves to the vicinity of the first area (4). The location of the remote device (3) within the first area (4) is determined by detecting a signal emitted by a radio beacon on the remote device (3). The remote device may be activated and/or deactivated using a paging unit in order to save power consumption. <IMAGE>
IPC 1-7
G01S 5/02; G01S 1/02; G01S 5/04; G01S 5/06; G08B 3/10; H04Q 7/38
IPC 8 full level
G01S 5/02 (2006.01); G06F 1/32 (2006.01); G08B 13/14 (2006.01)
CPC (source: EP US)
G01S 5/0205 (2013.01 - EP US); G01S 5/0257 (2013.01 - EP US); G06F 1/3209 (2013.01 - EP); G08B 13/1427 (2013.01 - EP); G08B 21/023 (2013.01 - EP); G08B 21/0272 (2013.01 - EP); H04W 4/50 (2018.01 - EP); H04W 12/126 (2021.01 - EP); H04W 12/30 (2021.01 - EP US); H04W 12/63 (2021.01 - EP US); Y02D 30/70 (2020.08 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1441235 A2 20040728; EP 1441235 A3 20050615; EP 1441235 A9 20041020; GB 0301504 D0 20030219; GB 2398445 A 20040818
DOCDB simple family (application)
EP 04250350 A 20040122; GB 0301504 A 20030122